JP6038723B2 - Rotary tiller - Google Patents

Description

  The present invention relates to a rotary tiller in which a tilling claw is attached to a flange of a claw shaft.

As disclosed in Patent Document 1, as a rotary tiller in which a tilling claw is attached to a flange of a claw shaft, a flange is attached to the outer periphery of the claw shaft that is rotatably supported around a shaft center on a rotary machine frame. A plurality of tilling claws are attached to each flange.
Further, in the side drive type rotary tiller disclosed in Patent Document 2, a plurality of claw brackets having fitting recesses at the tips are provided on the outer peripheral surface of the tiller shaft that is rotatably supported around the axis. The base end of the tilling nail that is projected in the outer diameter direction of the rod and bolted to the nail bracket is bolted to the nail bracket to prevent the long rod such as grass from being wrapped around the tilling shaft In addition, a long linear member is bridged away from the tilling shaft between the tilling claws spaced apart from each other in the axial direction of the tilling shaft.

JP 2008-22716 A JP 2004-141061 A

In the rotary cultivator of Patent Document 1, since a flange is formed by externally fitting a plate material on the outer periphery of the rotating shaft, the flange is an obstacle, and the claw shaft applied to Patent Document 2 is used. It is difficult to attach a long linear member for preventing a long rod such as grass from wrapping around the tilling shaft at a position relatively close to the nail shaft.
An object of the present invention is to provide a rotary cultivator capable of solving such problems of the prior art.

  An object of the present invention is to provide a rotary cultivator in which a linear member for preventing grass winding can be attached to a rotary cultivator for attaching a cultivating claw to a flange near the outer periphery of the claw shaft.

Specific means for solving the problems in the present invention are as follows.
First, a rotary cultivator in which a plurality of flanges 4 are provided in the direction of the claw axis on the outer periphery of the claw shaft 3 that is rotatably supported around the axis of the rotary machine frame 10, and the cultivating claw 2 is attached to each flange 4. There,
A through-hole 5 that penetrates in the direction of the claw axis is formed in the entire flange 4, and a linear member 6 for preventing grass winding is inserted into the entire through-hole 5, and a claw shaft is inserted at both ends of the linear member 6. A retaining means 7 is provided for preventing the flange 4 from being pulled out inward in the claw axial direction from the through hole 5 of the flange 4 located on both outer end sides in the direction ,
The flanges 4 to which the tilling claws 2 are attached are fixed to the claw shaft 3 so that the adjacent ones in the claw axis direction are out of phase with each other in the circumferential direction. A through hole 5 is formed at a position corresponding to the displacement of the claw 2, and the linear member 6 is inserted in a substantially straight line parallel to the shaft claw 3 over the entire flange 4 .

Second, the retaining means 7 is composed of a male screw 7a formed at at least one end of the linear member 6 and a nut 7b screwed to the male screw 7a.
Thirdly, the retaining means 7 is formed by a bent portion 7c obtained by bending at least one end of the linear member 6, or an enlarged portion 7d having a large diameter.
Fourth, the side frame 11 constituting the rotary machine casing 10 is formed with an insertion hole 11a corresponding to the through hole 5 of the flange 4 and into which the linear member 6 is inserted from the outside. Features.

Fifth, a rotary cultivator in which a plurality of flanges 4 are provided in the direction of the claw axis on the outer periphery of the claw shaft 3 that is rotatably supported around the axis of the rotary machine frame 10, and the cultivating claw 2 is attached to each flange 4. There,
A through-hole 5 that penetrates in the direction of the claw axis is formed in the entire flange 4, and a linear member 6 for preventing grass winding is inserted into the entire through-hole 5, and a claw shaft is inserted at both ends of the linear member 6. A retaining means 7 is provided for preventing the flange 4 from being pulled out inward in the claw axial direction from the through hole 5 of the flange 4 located on both outer end sides in the direction,
The side frame 11 constituting the rotary machine frame 10 is formed with an insertion hole 11a corresponding to the through hole 5 of the flange 4 and into which the linear member 6 is inserted from the outside.
Sixth, each flange 4 is formed of a disk donut-shaped plate-like member, and each flange 4 has a pair of tilling claws 2L bent leftward and tilling claws 2R bent rightward as a pair. It is characterized in that a plurality are provided.

This onset Ming, linear member 6 for protecting the grass around the through-hole 5 in total flange 4 is penetrated in Tsumejiku direction is inserted, the retaining means 7 are provided at both ends of the linear member 6 Therefore, a wire member 6 for preventing grass winding is inserted into all the flanges 4 to which the tilling claws 2 are attached, and the wire for preventing grass winding is placed at the optimum position of the rotary tiller for attaching the tilling claws 2 to the flange 4. The shaped member 6 can be easily fixed.

Further , since the retaining means 7 includes a male screw 7a formed at at least one end of the linear member 6 and a nut 7b screwed to the male screw 7a, the retaining member 7 prevents the linear member 6 from being detached from the flange 4. Tension adjustment can be done easily and easily.
Thirdly, the retaining means 7 is formed by a bent portion 7c obtained by bending at least one end of the linear member 6 or an enlarged portion 7d having a large diameter, so that the retaining means 7 can be easily and inexpensively formed. Can be formed.

The flanges 4 to which the tilling claws 2 are attached are fixed to the claw shafts 3 so that the adjacent ones in the claw axis direction are out of phase with each other in the circumferential direction. Since the through-hole 5 is formed at a position corresponding to the displacement of the tilling claw 2 and the linear member 6 is inserted substantially linearly over the entire flange 4, the entire flange 4 can be formed in the same shape.
Further , the side frame 11 constituting the rotary machine frame 10 is formed with an insertion hole 11a corresponding to the through hole 5 of the flange 4 and into which the linear member 6 is inserted from the outside. Even if a steel plate is used for 6, the linear member 6 can be inserted into the through hole 5 of the flange 4 from the outside of the side frame 11.

Also, each flange 4 is formed with a disk-donut-shaped plate member, each flange 4, the tilling claws 2R bent in tilling claws 2L and right bent to the left is at a circumferential interval becomes one set Since a plurality of them are provided, a large number of L-shaped claws can be attached to the flange 4 to which the linear member 6 for preventing grass winding is attached.

It is a section rear view of the whole rotary tiller which shows a 1st embodiment of the present invention. It is a side view of the rotary tiller. It is sectional drawing of the principal part. It is a side view of each flange. It is a side view of the tillage part which shows 2nd Embodiment of this invention. It is sectional drawing of the principal part. It is a side view of each flange. It is a side view of the tillage part which shows 3rd Embodiment of this invention. It is sectional drawing of the principal part. It is a whole side view which shows the rotary tiller with which the tractor vehicle body was mounted | worn.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 4 and 10 show a side drive type rotary tiller 1 according to a first embodiment of the present invention, which is connected to the rear part of a tractor vehicle body 100 through a three-point link mechanism 26 so as to be lifted and lowered. Has been.
The rotary cultivator 1 projects a support arm 15 from the gear case 12 to the left and right sides, and a transmission case 17 and a side frame 11 are attached to the outer ends of the left and right support arms 15 to constitute the rotary machine frame 10. A rotating short shaft 19 is provided at the bottom of the side frame 11, and the claw shaft 3 is connected between the rotating short shafts 19.

The rotary machine frame 10 is provided with left and right support stays 25 and a mast 29. The left and right support stays 25 are connected to the rear ends of a pair of left and right lower links 28 of a three-point link mechanism 26, and the mast 29 has a top link 27. It is connected.
The power transmitted from the PTO shaft 30 of the tractor body 100 to the input shaft 13 via the joint 31 is transmitted to the transmission chain in the transmission case 17 via the gear 14 in the gear case 12 and the transmission shaft 16 in the left support arm 15. The rotating short shaft 19 and the claw shaft 3 are driven by the means 18. A plurality of tilling claws 2 are fixed to the claw shaft 3 through a plurality of flanges 4 to form a tilling portion K, and the claw shaft 3 is rotationally driven in the direction of arrow A in FIGS. .

The rotary machine frame 10 includes a side plate 23 fixed to the inner surfaces of the transmission case 17 and the side frame 11, and a front frame member 31 that connects the front portions of the left and right side plates 23. A main cover 21 that covers the top of the tillage portion K is attached to the frame member 31, and a substantially central portion of the main cover 21 is supported by the gear case 12 via a fixing member 24.
Left and right support stays 25 are provided on the front frame member 31 and the main cover 21, a mast 29 is supported on the left and right support stays 25, and a rear cover (not shown) that covers the rear of the tillage part K is provided at the rear of the main cover 21. A rear side cover 22 that is pivotally supported and covers the rear side of the tillage portion K is provided on the rear side of the transmission case 17 and the side frame 11 and the left and right side plates 23.

A skid 20 for adjusting the tilling depth is attached to the side frame 11 and the transmission case 17 so that the vertical position can be adjusted and detachable. Only one of the left and right skids 20 may be used.
1-4, the said nail | claw axis | shaft 3 is a cylindrical rotating shaft, and the many flanges 4 are provided in the axial direction with the fixed space | interval, and six tillages are provided on one surface of each of these flanges 4. The claw 2 is fastened by a bolt B and a nut N.

4 (a) to 4 (f) correspond to the reference numerals (a) to (f) shown in FIG. 1. For example, the flange 4 in FIG. The phase is shifted by 20 ° in the circumferential direction with respect to the flange 4 and the flange 4 in FIG.
The flange 4 is a plate-like member formed in a disk donut shape, a hole in the center is fitted to the claw shaft 3, and an attachment hole 4a for mounting the six tilling claws 2 is provided on the outer peripheral side. Six sets are provided with predetermined intervals in the direction. The mounting hole 4a is a pair of two holes to which one tilling claw 2 is attached, and three tilling left and right directions are attached to a total of six tilling claws 2.

1 to 4, the tilling claw 2 is an L-shaped claw that is bent toward the transmission case 17 side or the side frame 11 side as viewed from the front from the vicinity of the center to the tip portion. A mounting hole 2 a for fixing to the flange 4 is provided in the mounting base 8.
Hereinafter, the tilling claw 2 bent toward the transmission case 17 side is referred to as a left-side tilling claw 2L, and the tilling claw 2 bent toward the side frame 11 side is referred to as a right-side tilling claw 2R. The left and right tilling claws 2L and 2R are alternately arranged on one side of the flange 4 in the circumferential direction, and one left-side tilling claw 2L and one right-side tilling claw 2R form a pair. The pair of left and right tilling claws 2L, 2R are arranged displaced by 120 °.

  Further, the flange 4 has a set of six through-holes 5 for inserting the linear member 6 for preventing the winding around the inside of the mounting hole 4a. Two sets are provided at displaced positions. Each set of six through holes 5 is provided at a location displaced by 20 ° in the circumferential direction, and corresponds to the phase of all six flanges 4. The six flanges 4 have six through holes. Any one of 5 is located on one straight line parallel to the claw axis 3.

That is, two sets of six through-holes 5 at positions displaced by approximately 180 ° are formed in the flange 4 and are positioned in the same phase in the circumferential direction of the claw axis as shown in FIGS. The through-holes 5 are arranged in a straight line and a pair is formed at positions displaced by 180 ° in the circumferential direction, so that two linear linear members 6 can be inserted in parallel with the claw shaft 3. .
The flange 4 has six sets of mounting holes 4a and two sets of six through holes 5, so that all the flanges 4 are formed in the same shape, and the phase is shifted by 20 ° with respect to the claw shaft 3. If fixed, the left and right tilling claws 2L and 2R can be attached and the linear member 6 can be inserted.

The linear member 6 is made of a bar (steel) or a long wire material that is slightly shorter than the claw shaft 3 and slightly longer than the distance between the flanges 4 at both outer ends of the claw shaft 3, and has male screws at both ends. 7a is formed. The male screw 7a is screwed with two nuts 7b from the outside of the flanges 4 at both outer ends, thereby constituting a retaining means 7 that prevents the nut from coming out inward in the claw axis direction. The retaining means 7 can apply tension and adjust tension of the linear member 6 depending on the position of the nut 7b.

In the side frame 11 of the rotary machine frame 10, one insertion hole 11 a is formed corresponding to the through-hole 5 that is in a straight line of all the flanges 4.
When the linear member 6 is a steel plate or a wire that is difficult to bend, it moves parallel to the claw shaft 3 while being inserted into the insertion hole 11 a from the outside of the side frame 11, and the straight through-holes 5 of all the flanges 4 are aligned. The male screw 7a is disposed so as to protrude outward from the flanges 4 at both outer ends, and nuts 7b are screwed and fastened to the protruding male screws 7a. Mounted on the flange 4 in a retaining state.

When the linear member 6 is a bendable wire, the linear member 6 is inserted from the lower side of the side frame 11 into the through holes 5 of all the flanges 4 without using the insertion hole 11a of the side frame 11. I can.
The linear member 6 is placed over the entire flange 4 and is arranged radially away from the claw shaft 3 but relatively close to the claw shaft 3 so as to wind around the claw shaft 3 during tillage. Even if the grass is prevented from being wound, and the grass may be wound, the claw shaft 3 and the linear member 6 are separated from each other.

5 to 7 show a rotary cultivator according to a second embodiment of the present invention. The second embodiment differs from the first embodiment in the formation of the through holes 5 in the flange 4 and the formation of the retaining means 7.
In the flange 4, two notch recesses 50 are formed at positions displaced from each other by 180 ° in the circumferential direction. Each notch recess 50 is formed at an intermediate position of a set of mounting holes 2a to which the mounting base 8 of the tillage claw 2 is fastened, from the outer periphery to the inner side of the mounting hole 2a. When the mounting base 8 of the tilling claw 2 is attached to the flange 4 with the bolt B, the bottom remains by closing the opening side of the notch recess 50.

When the attachment base 8 of the tillage claw 2 is attached to the flange 4, the notch recess 50 is closed by the attachment base 8 leaving the bottom, and the bottom of the notch recess 50 has a through-hole 5 through which the linear member 6 is inserted. Will form.
The linear member 6 is inserted into the notch recess 50 from the outer peripheral side with respect to all the flanges 4 before the tilling claw 2 is attached, and the attachment base 8 of the tilling claw 2 is attached to the flange 4 so that the Withdrawal is prevented. The linear member 6 that has entered the bottom of the notch recess 50 is closed by the attachment base 8 with the bottom of the notch recess 50 left, so that the through hole 5 is penetrated.

Enlarged portions 7d that are enlarged by flattening are formed at both ends of the linear member 6, and these enlarged portions 7d are formed in the nail axial direction from the through holes 5 of the flange 4 that are located on both outer ends in the nail axial direction. The retaining means 7 is configured to prevent the slipping out.
The flange 4 of the second embodiment has six sets of mounting holes 4a and one set of through-hole forming cutout recesses 50, and all the flanges 4 are formed in the same shape. 7 (a)-(f), the phase is shifted by 20 ° with respect to the claw shaft 3 and fixed so that the left and right tilling claws 2L, 2R can be attached and the linear member 6 can be inserted. Yes.

Since the notch recesses 50 of all the flanges 4 are displaced by 20 °, the linear member 6 does not become parallel to the claw shaft 3 but has a spiral shape. Therefore, a long bar material or a long wire material that can be bent slightly is used for the linear member 6.
8 and 9 show a rotary tiller according to a third embodiment of the present invention. The third embodiment is different from the second embodiment in the retaining means 7 at the end of the linear member 6. The linear member 6 forms a bent portion 7 c by bending the end portion outside the flanges 4 at both ends to constitute the retaining means 7.

  The linear member 6 is inserted into the notch recess 50 from the outer peripheral side of the flange 4 with respect to all the flanges 4 before the tilling claws 2 are attached, and the attachment base 8 is attached to prevent the separation from the notch recess 50. The linear member 6 entering the through hole 5 at the bottom of the notch recess 50 is prevented from moving in the radial direction of the claw shaft 3 by the mounting base 8 of the tilling claw 2, and the bent portions 7 c at both ends are formed on the flange 4. The through hole 5 is prevented from coming inward in the direction of the claw axis.

In the present invention, the shape of each member and the positional relationship between the front, back, left, right, and top in the embodiment are best configured as shown in FIGS. However, it is not limited to the said embodiment, A member, a structure can be variously deformed, and a combination can also be changed.
For example, the number of tilling claws 2 attached to the flange 4 may be one, or two sets may be provided by being displaced by 180 °, and further, nails instead of L-shaped claws may be used. When the number of tilling claws 2 to be attached is small, the outer peripheral shape of the flange 4 may be elliptical.

One or three or more linear members 6 may be provided. The retaining means 7 provided at both ends of the linear member 6 has the configuration of the first to third embodiments in which one end side of the linear member 6 is configured in any one of the first to third embodiments and the other end side is different from the one end side. Alternatively, the enlarged portion 7d may be formed by fitting (crimping) a cylindrical body to the end portion of the linear member 6 and enlarging it.
The notch recess 50 constituting the through hole 5 is located at the center of the pair of mounting holes 2a, but may be located at a position shifted from the center.

  You may arrange | position the auxiliary | assistant flange 4 and the tilling nail | claw 2 in the nail-axis direction outer end side rather than all the flanges 4 which attach the linear member 6 of the nail | claw axis | shaft 3. FIG.

DESCRIPTION OF SYMBOLS 1 Rotary cultivator 2 Cultivation claw 3 Claw shaft 4 Flange 5 Through-hole 6 Linear member 7 Stopping means 7a Male screw 7b Nut 7c Bending part 7d Enlarged part 8 Mounting base 10 Rotary machine frame 11 Side frame 12 Gear case 13 Input shaft 15 Support arm

Claims (6)

A plurality of flanges (4) are provided in the direction of the claw axis on the outer periphery of the claw shaft (3) supported so as to be rotatable around the axis of the rotary machine frame (10), and the tilling claw (2) is provided on each flange (4). A mounted rotary tiller,
A through hole (5) penetrating in the direction of the claw axis is formed in all the flanges (4), and a linear member (6) for preventing cigarettes is inserted into all the through holes (5). At both ends of the member (6), retaining means (7) for preventing the flange (4) located at both outer end sides of the claw axial direction from coming out from the through holes (5) inward in the claw axial direction are provided .
The flange (4) to which the tilling claw (2) is attached is fixed to the claw shaft (3) so that the adjacent ones in the claw axis direction are out of phase with each other in the circumferential direction. Each flange (4) is formed with a through hole (5) at a position corresponding to the displacement of all tilling claws (2), and the linear member (6) is connected to the shaft claw (3) over the entire flange (4). Rotary tiller that is inserted in a substantially straight line in parallel with   The said retaining means (7) is comprised by the external thread (7a) formed in the at least one edge part of the linear member (6), and the nut (7b) screwed together in it, The said structure is characterized by the above-mentioned. Item 2. A rotary cultivator according to item 1.   The retaining means (7) is formed by a bent part (7c) obtained by bending at least one end of the linear member (6) or an enlarged part (7d) having a large diameter. The rotary cultivator according to claim 1. The side frame (11) constituting the rotary machine frame (10) has an insertion hole (11a) corresponding to the through hole (5) of the flange (4) and into which the linear member (6) is inserted from the outside. ) Is formed . The rotary tiller according to any one of claims 1 to 3. A plurality of flanges (4) are provided in the direction of the claw axis on the outer periphery of the claw shaft (3) supported so as to be rotatable around the axis of the rotary machine frame (10), and the tilling claw (2) is provided on each flange (4). A mounted rotary tiller,
A through hole (5) penetrating in the direction of the claw axis is formed in all the flanges (4), and a linear member (6) for preventing cigarettes is inserted into all the through holes (5). At both ends of the member (6), retaining means (7) for preventing the flange (4) located at both outer end sides of the claw axial direction from coming out from the through holes (5) inward in the claw axial direction are provided.
The side frame (11) constituting the rotary machine frame (10) has an insertion hole (11a) corresponding to the through hole (5) of the flange (4) and into which the linear member (6) is inserted from the outside. ) characteristics and to Carlo Tari cultivator that is formed.   Each of the flanges (4) is formed of a disk donut-shaped plate member, and each of the flanges (4) includes a pair of a tilling claw (2L) bent to the left and a tilling claw (2R) bent to the right. The rotary tiller according to claim 1, wherein a plurality of the rotary tillers are provided at intervals in the circumferential direction.

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